On 06/29/2015 at 11:59 AM, Bret Busby wrote:
> On 29/06/2015, The Wanderer <wanderer@fastmail.fm> wrote:
>> Did you try the command based on 'lspci -k' which I gave earlier?
>> I think we've tracked down the driver you probably need, but I'm
>> fairly sure that command would have been an easier way of finding
>> out what driver(s) you're actually currently using.
>
> No, I think I had not. I apologise.
>
> "
> root@bret-av3-772g-deb6:~# lspci -k | grep VGA -A 2
> 00:02.0 VGA compatible controller: Intel Corporation Device 0416 (rev 06)
> Subsystem: Acer Incorporated [ALI] Device 0781
> 00:03.0 Audio device: Intel Corporation Device 0c0c (rev 06)
> root@bret-av3-772g-deb6:~#
> "
>
> Does that show the driver(s) - I thought that showed only the
> hardware devices identifiers.
It does, but only if a driver is actually in use loaded. Since it
doesn't show one for yours, that means that one is not in fact in use
for that device. This is reasonable if the system (read mainly: kernel)
you're running is too old to have support included.
For comparison, on my system with a different graphics device, I get:
$ lspci -k | grep VGA -A 2
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] Barts XT [Radeon HD 6870]
Subsystem: Hightech Information System Ltd. Device 2010
Kernel driver in use: radeon
> An interesting observation - in examinng the attached xorg log file,
> at about the third screen down, the driver that was installed for
> the Intel integrated graphics controller, appears to be the same as
> for the Acer 5750G; the driver is compatible with the Sandybridge
> chipset applicable to the Acer 5750G, but, apparently does not
> include compatibility with the Haswell chipset of the Acer V3-772G.
I'm afraid X driver compatibility is one area where I've never learned
more than the superficial details. It looks to me as if X thinks the
available intel_drv.so is compatible with your hardware, but for all I
know I could be wrong about that.
I do think it looks a little odd that (based on that log file) you're
apparently using Intel video drivers but the NVIDIA GLX stack, but I
can't swear that that's not going to be compatible.
> However, after having written that, I think that the web page at
> https://cateee.net/lkddb/web-lkddb/DRM_I915.html
> indicates that laptop computers with an Intel i7 CPU, should be
> compatible with the i915 chipset (?) or modules(?), and thus, the
> existing, installed, driver for the Intel graphics controller, is
> the appropriate one for the Intel Haswell graphics controller?
If you look into the details, that Web page indicates that support is
present from kernel 2.6.36 onwards. That would seem to imply that it is
not present earlier. What kernel version are you running? ('uname -r'
would be the command.)
--
The Wanderer
The reasonable man adapts himself to the world; the unreasonable one
persists in trying to adapt the world to himself. Therefore all
progress depends on the unreasonable man. -- George Bernard Shaw
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